Synthesis of superconducting cobalt oxyhydrates using a novel method: Electrolyzed and oxidized water

Chia-Jyi Liu, Tsung Hsien Wu, Lin Li Hsu, Jung Sheng Wang, Shu Yo Chen

Research output: Contribution to journalArticle

Abstract

By deintercalation of Na+ followed by inserting bilayers of water molecules into the host lattice, the layered cobalt oxide of γ-Na0.7CoO2 undergoes a topotactic transformation to a layered cobalt oxyhydrate of Na0.35(H2O)1.3CoO2-δ with the c-axis expanded from c ≈ 10.9 Å to c ≈ 19.6 Å. In this paper, we demonstrate that the superconducting phase of c ≈ 19.6 Å can be directly obtained by simply immersing γ-Na0.7CoO2 powders in electrolyzed/oxidized (EO) water, which is readily available from a commercial electrolyzed water generator. We found that high oxidation-reduction potential of EO water drives the oxidation of the cobalt ions accompanying by the formation of the superconductive c ≈ 19.6 Å phase. Our results demonstrate how EO water can be used to oxidize the cobalt ions and hence form superconducting cobalt oxyhydrates in a clean and simple way and may provide an economic and environment-friendly route to oxidize the transition metal of complex metal oxides.

Original languageEnglish
Pages (from-to)493-494
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume460-462 I
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2007 Sep 1

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Cobalt
cobalt
Water
synthesis
water
Ions
oxidation
Oxides
cobalt oxides
Coordination Complexes
Metal complexes
Powders
Transition metals
metal oxides
economics
ions
generators
Metals
transition metals
routes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Liu, Chia-Jyi ; Wu, Tsung Hsien ; Hsu, Lin Li ; Wang, Jung Sheng ; Chen, Shu Yo. / Synthesis of superconducting cobalt oxyhydrates using a novel method : Electrolyzed and oxidized water. In: Physica C: Superconductivity and its applications. 2007 ; Vol. 460-462 I, No. SPEC. ISS. pp. 493-494.
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abstract = "By deintercalation of Na+ followed by inserting bilayers of water molecules into the host lattice, the layered cobalt oxide of γ-Na0.7CoO2 undergoes a topotactic transformation to a layered cobalt oxyhydrate of Na0.35(H2O)1.3CoO2-δ with the c-axis expanded from c ≈ 10.9 {\AA} to c ≈ 19.6 {\AA}. In this paper, we demonstrate that the superconducting phase of c ≈ 19.6 {\AA} can be directly obtained by simply immersing γ-Na0.7CoO2 powders in electrolyzed/oxidized (EO) water, which is readily available from a commercial electrolyzed water generator. We found that high oxidation-reduction potential of EO water drives the oxidation of the cobalt ions accompanying by the formation of the superconductive c ≈ 19.6 {\AA} phase. Our results demonstrate how EO water can be used to oxidize the cobalt ions and hence form superconducting cobalt oxyhydrates in a clean and simple way and may provide an economic and environment-friendly route to oxidize the transition metal of complex metal oxides.",
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Synthesis of superconducting cobalt oxyhydrates using a novel method : Electrolyzed and oxidized water. / Liu, Chia-Jyi; Wu, Tsung Hsien; Hsu, Lin Li; Wang, Jung Sheng; Chen, Shu Yo.

In: Physica C: Superconductivity and its applications, Vol. 460-462 I, No. SPEC. ISS., 01.09.2007, p. 493-494.

Research output: Contribution to journalArticle

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AU - Liu, Chia-Jyi

AU - Wu, Tsung Hsien

AU - Hsu, Lin Li

AU - Wang, Jung Sheng

AU - Chen, Shu Yo

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